time: add a period_limiter class
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27
time.cpp
27
time.cpp
@ -14,6 +14,7 @@
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using cruft::delta_clock;
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using cruft::delta_clock;
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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static const uint64_t SECOND = 1'000'000'000UL;
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static const uint64_t SECOND = 1'000'000'000UL;
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static const uint64_t MILLISECOND = 1'000'000UL;
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static const uint64_t MILLISECOND = 1'000'000UL;
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@ -91,6 +92,32 @@ cruft::rate_limiter::poll (void)
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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cruft::period_limiter::period_limiter (std::chrono::nanoseconds _period)
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: period_limiter (_period.count ())
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{ ; }
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//-----------------------------------------------------------------------------
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cruft::period_limiter::period_limiter (u64 _period)
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: m_period (_period)
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, m_prev (nanoseconds () - _period)
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{ ; }
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//-----------------------------------------------------------------------------
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void cruft::period_limiter::poll (void)
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{
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auto const now = nanoseconds ();
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auto const diff = now - m_prev;
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if (diff < m_period)
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sleep (m_period - diff);
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m_prev = nanoseconds ();
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}
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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cruft::polled_duration::polled_duration (std::string name, uint64_t interval):
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cruft::polled_duration::polled_duration (std::string name, uint64_t interval):
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m_name (std::move (name)),
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m_name (std::move (name)),
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19
time.hpp
19
time.hpp
@ -3,12 +3,13 @@
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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*
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* Copyright 2010-2016 Danny Robson <danny@nerdcruft.net>
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* Copyright 2010-2016, 2022 Danny Robson <danny@nerdcruft.net>
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*/
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*/
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#pragma once
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#pragma once
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#include "stats.hpp"
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#include "./std.hpp"
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#include "./stats.hpp"
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#include <chrono>
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#include <chrono>
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#include <cstdint>
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#include <cstdint>
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@ -75,6 +76,20 @@ namespace cruft {
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};
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};
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///////////////////////////////////////////////////////////////////////////
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class period_limiter {
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public:
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explicit period_limiter (std::chrono::nanoseconds _period);
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explicit period_limiter (u64);
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void poll (void);
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private:
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u64 m_period;
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u64 m_prev;
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};
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///////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////
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class polled_duration {
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class polled_duration {
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public:
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public:
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